Haulage vehicles (8)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">haulage vehicles</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tractors that I've seen before include "Towers" , "Agricultural vehicles" , "Haulage vehicles" , "Slow-moving vehicles for pulling farm machinery" , "Vehicles for heavy farm work" .)
(Other definitions for lorries that I've seen before include "forms of transport" , "Large transport vehicles" , "Cargo vehicles" , "Trucks without sides" , "HGVs" .)